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Questions tagged [chimney]

For questions specifically relating to structures that ventilate combustion byproducts of fuel burned in an interior space, such as a fireplace, stove, or furnace.

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1 answer
32 views

How to stop or catch debris falling down a disused chimney

I live in flat that's part of a 1800s building conversion. It has this nice fireplace, which is perfect as a TV nook, but there's constantly bits of debris (dust and even bits of brick) falling down. ...
0 votes
1 answer
48 views

Installing a chimney cap - DIY vs. Pro [closed]

This chimney is missing a chimney cap. The task of putting on a chimney cap itself seems like a simple task, but the concern is safely accessing the top of the chimney on a steep roof. Is this ...
0 votes
1 answer
47 views

Help Diagnosing Chimney Leak?

So I recently purchased a new home, which has a "double wide" chimney stack with two flues, one for my downstairs living room fireplace and one for my upstairs one in the bedroom right above ...
0 votes
0 answers
25 views

Chimney water leak

we have a damp issue around the chimney breast in our front bedroom. To try to resolve, we had a roofer come out and inspect. Without even getting up on the roof, he stated by looking from the ...
1 vote
0 answers
15 views

Interior chimney stone veneer mortar cleanup

I have an exterior brick chimney that has had water infiltration. Hopefully that has been fixed. Water would work it's way down inside, and they hit the interior stone veneer system, and come out ...
1 vote
1 answer
140 views

Efflorescence on chimney bricks inside the house

I have recently whitewashed my brick chimney. It’s irrelevant to the problem but white background color makes efflorescence more noticeable.  After a month of whitewashing, my chimney (January in MA, ...
9 votes
3 answers
22k views

Is installing a chimney liner a DIY project?

My chimney (25ft approximately, one story house) was recently inspected and the guy recommended a chimney liner for the furnace due to the grouting having been eaten away. He quoted $2000 for the ...
0 votes
0 answers
10 views

How to seal indoor rendering?

I'm working on making my chimney hearth nice. But before and after plastering, it appears that there is moisture coming through on part of the rendering. I realise I can't go further until this is ...
3 votes
3 answers
1k views

Is visible daylight between lead flashing and the chimney brick stack normal?

Earlier in the year I employed a contractor to replace the lead flashing around my chimneys - ironically I had previously contracted someone else to do this and they had done such a bad job I needed ...
9 votes
3 answers
2k views

Rebuilt chimney still leaking

Just rebuilt chimney & it’s still leaking. we had it brought down into the house rebuilt, reflashed and re-roofed around the flashing area. As well as the roofer was to put down a rain and ice ...
2 votes
2 answers
5k views

Chimney still leaking despite reflashing and coating

My chimney was leaking and the contractor pulled apart the roof around it and reput it with proper sealing and coating. Then he also coated the entire chimney with Geocel siliconized seal which is ...
0 votes
0 answers
30 views

Woodburning stove ENCORE Model 1450 - where is the air intake?

I have pretty old woodburning stove ENCORE Non-Catalytic Model 1450(by Vermont Castings). It suddenly (a week ago) stopped burning wood well, it looks like it does not get enough air in. Its air ...
1 vote
2 answers
2k views

Can I put a box fan in a chimney to help circulate out hot summer air?

I have a classic brick chimney for a wood fireplace only (i.e. no hot water tank or other things sharing the stack). In peak summer heat, the interior of the upstairs is well above the exterior ...
11 votes
3 answers
3k views

Why does a builder think this chimney is about to collapse?

A builder has just scared the life out of me by saying that my chimney is about to fall down because it hasn't been pointed. How can he know just by a visual inspection?
2 votes
1 answer
4k views

Adding a new fireplace to upstairs bedroom. Want to tap into existing unused vent

Our house used to have a wood burning stove in the basement. We also have a fireplace on the first floor of the house, leaving two separate vents in our chimney. Before we bought the house it was ...
1 vote
0 answers
77 views

House breathing through the chimney

I had the attic spray-foamed and absolutely love it. An unfortunate side-effect is that now whenever we have a fire in our fireplace (wood burning), after the fire goes out, the house fills with an ...
0 votes
1 answer
65 views

Do gas powered fireplace chimneys need to be cleaned if it hasn't been turned fully on for years even during winter?

I have a gas powered fireplace which after moving into our house 5 years ago, we havent used even once and the only fire that is in there is the pilot one which remains on even when the switch outside ...
0 votes
0 answers
32 views

Frost buildup on interior chimney stone and steps to address the problem?

Frost has built up on the gas fireplace chimney stone that intersects with the NE wall and the ceiling. Background info: This is the living room of our bungalow. The ceiling directly above that frost ...
1 vote
3 answers
673 views

Should I fill the gap between sleeve and chimney structure?

Currently, my chimney is brick and has a 8" type B metal duct pipe coming out of it as a sleeve, which exhausts home heat and water heater appliances. The chimney was dormant for many years ...
2 votes
2 answers
8k views

How can I tell if this is a gas or wood burning fireplace

From what I've been able to determine what's pictured is a gas log lighter for wood burning fireplaces. The prior owner did some questionable stuff so I don't know if it was originally gas and he "...
0 votes
1 answer
35 views

Chimney Cap Sizing

I am looking for help with finding a chimney cap that fits the double layer flue on my chimney. See below for an image with measurements. All of the chimney cap sizes online seem to have one ...
1 vote
1 answer
257 views

Do I have damper on my wood stove?

I have a wood-burning stove, and I use it once or twice a year. When using using it I only use a knob (pull or push) which control the air intake. I have noticed that when I use the stove I smell ...
0 votes
3 answers
564 views

1920s stove pipe walled off behind kitchen

I have a giant metal pipe filled with concrete or something, it doesn't go anywhere, it's just taking up space in my closet. I assume there used to be a big wood burning stove in the kitchen, and ...
-2 votes
1 answer
64 views

How to bring electric cooker in chimney's coverage when there's gas hob occupying the whole place [closed]

I have a chimney which covers the 4 burner gas hob but I don't have any space to keep my electric rice cooker. the electric rice cooker produces lots of steam which increases the humidity level at ...
0 votes
0 answers
32 views

Mounting tv above gas fireplace? [duplicate]

We have long wanted to mount our tv in the basement above our gas fireplace. I assume the gas fireplace insert sits inside the existing hearth with a brick chimney outside. We do not use the fireplace ...
1 vote
1 answer
64 views

What are my options for repairing a rusted galvanized steel flue?

How difficult is this rust to clean up? Will I need a full replacement?
3 votes
2 answers
2k views

Black tar like substance and streaks on attic roof and stains on chimney

I am looking into buying this house but saw a few things that concerned me. The house got some strange tar like streaks on the inside of the roof. The chimney also has some black stains on the front, ...
2 votes
2 answers
7k views

Is there a required spacing between waste vent line and chimney?

This question seeks answers with one of the following as supporting evidence: International standards, other standards widely recognized in multiple areas of the United States, or sound building and ...
0 votes
1 answer
26 views

How can I extend the chimney insulation shield before adding cellulose?

I'm adding 12 inches on blown cellulose on top of the existing fiberglass. There is a shield around the chimmney duct but it is not long enough, see: The cellulose will enter in contact with the hot ...
0 votes
0 answers
80 views

Noticed some gaps/rot on the wood trim of my chimney need temp solution for next week and also long term solution, any suggestions?

Noticed some gaps/rot on the wood trim of my chimney. Need temp solution for rain next week and also long term solution, any suggestions? I posted this a couple weeks ago but managed to get my drone ...
2 votes
1 answer
366 views

How do I remove this old flue pipe?

There's an old chimney for a furnace in my basement which is no longer being used, and I'd like to take it out. It's going through cinder block, with concrete sealing around both sides. Outer ...
0 votes
0 answers
38 views

Gas Fireplace Chimney / Flue Question

In a new build the fireplace installer came to install the last portion of flue, cap, and "crown" - in my case all of this is metal. They left without saying anything (probably normal since ...
1 vote
2 answers
192 views

Black box on chimney near ceiling in cabin

What is the purpose of the black box on the chimney near the ceiling in this cabin? Location: Nova Scotia, Canada I'm not sure what kind of stove it is.
0 votes
0 answers
38 views

Noticed some gaps/rot on the chimney the other day, does this look like serious damage?

New homeowner here, noticed some gaps/rot on the chimney the other day, does this look like serious damage? I'm not actually using the chimney but I'm worried about water damage from rain making it ...
0 votes
2 answers
732 views

What should I use to fill a large gap where a metal flue enters a chimney?

I had an inspector come through and said that I should fill this to prevent carbon monoxide. It's my main chimney for my oil tank and is in constant use when it's cold. I'm in southern Vermont and I ...
0 votes
0 answers
25 views

Multiple Flue Liners in Single Flue, 1 standard appliance 1 high efficiency appliance?

I have a 8x12 ID clay tile chimney in good condition. 23' from basement chimney penetration to roof exit. At the basement there is a 7" round vent into the chimney space. Shared by the LP boiler ...
0 votes
0 answers
29 views

Odor in old farm house

Recently purchased a 80 yr old two story farm house. There are two chimneys in the middle of the house with holes for stove pipes on both floors. There is an odor I can't seem to get out of the house, ...
0 votes
0 answers
134 views

Repair/restoration of plaster cracking in front of chimney?

I'm repainting the interior of my 1942 brick house (N. Florida). The walls are plaster, and repainting was going fine until I got to the section in front of the chimney. After removing artwork from ...
0 votes
2 answers
310 views

Filling and capping gap around round chimney liner

I would like to fill and cap the last few inches (is there a standard how deep?) between this r6" ound chimney liner and the bricks around it. I was planning to make a base with plywood that ...
0 votes
0 answers
467 views

Running ductwork through unused chimney

The chimney in our house has been unused for years since there is no fireplace and the high efficiency units we have vent out the side of the house. We recently had the chimney removed down to the ...
0 votes
0 answers
109 views

What is the black stuff they put on NYC chimneys?

Mine has begun to crack so I want to give it another once over coat and also silver coat it - is the stuff they use Karnak 19 Flashing Cement or something else?
2 votes
1 answer
685 views

Is my basement chimney suitable for venting a gas-powered boiler?

I just purchased a home, and I am looking to install a new gas powered boiler. The current boiler vents into 100 year old chimney. To my surprise, there is an unobstructed view from the bottom of the ...
0 votes
0 answers
28 views

Chimney Crown repair vs resealing

When is a chimney crown too far gone to repair? In my homebuyer inspection I was told "The cement crown on chimney chase and brick mortar is cracked and/or missing, this needs prep and recoat&...
0 votes
1 answer
91 views

Use a 1/8 inch mesh to keep out roaches?

Can I put a 1/8th inch mesh over the unused chimney and chimney cap to keep roaches and other large insects from entering? Somehow a few get every once in a while, and I find them on the bench or base,...
0 votes
0 answers
138 views

How to tear down a brick chimney

My 100 year old chimney is in bad shape, so I decided to tear it down and rebuild it. Prior to beginning, I thought it was just the bricks and a steel liner, however once I took off the crown and the ...
0 votes
1 answer
456 views

How far to place Double Wall Chimney Pipe from Beams, Woodstove from Post

I am planning to extend a half floor to become a complete floor, however this will cause it to encompass a double wall chimney pipe that is currently connected through the roof. To build this second ...
-1 votes
3 answers
855 views

Relocating or removing old vent hood outlet/receptacle

Decided to remove my old under cabinet over the range vent hood to install a chimney vent hood. During the install, the electrician noticed that the existing outlet that the old vent hood plugged into,...
1 vote
1 answer
1k views

Wood burning stove chimney leaking

A house we bought a few years ago has a newly fitted wood burning stove and chimney. During combined heavy rain and high winds we will get water leaking down our inside wall near the stove. I’m went ...
0 votes
1 answer
77 views

Detached house chimney removal uk [closed]

Hi I am having a house renovation and we have removed the central chimney stack from the house. The house is detached and the Stack removed from the roof, bedroom and ground level rooms. What’s left ...
0 votes
0 answers
722 views

Can I safely drill into a wall behind which is my fireplace and chimney?

I would like to drill 2-4 holes to mount a monitor on the wall of my office. The problem is that on the other side of my plaster wall is the back of my fireplace and chimney. Can I safely drill into ...

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